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Dion Fortune was born on December 6, 1890.
Dion Fortune died on 1946-01-08.
Dion Fortune's family motto was "Deo non fortuna" which means "by God, not chance".
Other than the name Dion, no. The Dion from Dion and the Belmonts is Dion DiMucci (Dion is used as a first name, not a last name).